Improving home insulation is one of the most effective ways to reduce energy bills and enhance comfort. Internal Wall Insulation Grants provide financial assistance for homeowners and tenants looking to upgrade their property’s insulation. These grants, available through schemes like ECO 4, help cover the cost of installing internal wall insulation (IWI) to improve energy efficiency and cut heating costs.

What Is Internal Wall Insulation (IWI)?

Internal Wall Insulation (IWI) involves fitting insulation boards or stud walls with insulating materials on the inside of external walls. This helps retain heat within the home, making it warmer in winter and cooler in summer.

Key Benefits of Internal Wall Insulation:

  • Lower energy bills – Reduces heat loss and cuts heating costs by up to 30%.

  • Improved home comfort – Maintains a stable indoor temperature.

  • Reduced carbon footprint – Helps the UK meet net-zero emission targets.

  • Eliminates damp and condensation – Creates a healthier indoor environment.

  • Increased property value – Enhances EPC ratings and makes homes more energy-efficient.

What Are Internal Wall Insulation Grants?

Several government-backed schemes offer grants for internal wall insulation to help homeowners and tenants improve their home’s energy efficiency. These include:

1. ECO 4 Scheme

The Energy Company Obligation (ECO 4) scheme provides grants to upgrade insulation and heating systems for low-income households or properties with poor energy efficiency ratings.

2. Great British Insulation Scheme (GBIS)

Previously known as the ECO+ scheme, GBIS provides funding for internal wall insulation to help reduce energy consumption in qualifying households.

3. Local Authority Flexible Eligibility (LA Flex)

Some councils extend ECO 4 funding to households not receiving benefits but struggling with high energy costs.

4. Home Upgrade Grant (HUG)

For homes off the gas grid, this scheme supports insulation, heating, and renewable energy improvements.

Who Is Eligible for Internal Wall Insulation Grants?

To qualify for an internal wall insulation grant, you must meet specific criteria:

  1. Property Type – Suitable for solid wall properties, typically built before the 1920s.

  2. Energy Performance Certificate (EPC) Rating – Properties with an EPC rating of D, E, F, or G are eligible.

  3. Income-Based Criteria – You or someone in your household must receive one of the following qualifying benefits:

    • Universal Credit

    • Pension Credit

    • Income Support

    • Housing Benefit

    • Working Tax Credit

    • Disability-related benefits

  4. Private Tenants & Landlords – Tenants can apply with landlord approval.

  5. Local Authority Schemes – If you don’t receive benefits, LA Flex may apply.

How Much Can You Save with Internal Wall Insulation?

Installing internal wall insulation can save homeowners up to £375 per year on energy bills, according to the Energy Saving Trust. The installation cost ranges from £4,000 to £13,000, but grants can cover a substantial portion or even the full cost.

How to Apply for an Internal Wall Insulation Grant

Applying for an internal wall insulation grant is straightforward:

  1. Check Eligibility – See if you qualify under ECO 4, GBIS, or LA Flex criteria.

  2. Find a Government-Approved Installer – Work with a certified ECO 4 installer.

  3. Get a Home Assessment – A professional assesses your home’s insulation needs.

  4. Grant Approval & Installation – If eligible, the insulation work is carried out at little or no cost.

  5. Enjoy Energy Savings – Benefit from lower energy bills and increased comfort.

Why Choose a Certified ECO 4 Installer?

Working with a government-approved installer ensures:

  • Access to maximum grant funding.

  • Safe, professional installation.

  • Compliance with UK building regulations.

  • Warranty-backed insulation solutions.

Final Thoughts

Internal Wall Insulation Grants provide an excellent opportunity to upgrade home insulation, lower energy bills, and enhance energy efficiency. With government funding available through schemes like ECO 4, GBIS, and LA Flex, homeowners and tenants can improve their home’s warmth at little to no cost.

If you think you may qualify, contact a certified ECO 4 installer today to begin your application and secure funding for internal wall insulation!